226 MEMOIRS OF THE CARNEGIE MUSEUM 
is a curious feature of this genus which seems to have departed from Daphanus, 
Temnocyon,* and also from the recent canids generally, while, according to observa- 
tions by Dr. Matthew (J. ¢., p. 867) upon Miacis, its affinity with regard to the short 
transverse processes would seem to recall the earlier tertiary types. Asin Daphanus 
the metapophyses, anapophyses, and neural spines are proportionally more robust 
than those in the recent dogs. The meta- and anapophyses are heaviest on the first 
lumbar and gradually decrease in size backwards, the anapophysis of the fifth 
lumbar being quite small. Except on the first, second, and seventh lumbars the 
neural spines are broken off superiorly, but enough remains to ascertain their great 
antero-posterior diameters, which are not unlike those in canids generally. 
MEASUREMENTS OF SECOND AND FirtH LUMBAR VERTEBRA. 
L.2 L5 
Mm. Mm. 
SAIGELOSp OR DELIOL: CIATOGOM OL CON LTA. sd ran stasis iachsssficcssrisardasestvesporticssurdetisberctescuevses 36 40 
Transverse diameter of centra posteriorly... bards 29 
Vertical diameter of centra posteriorly .... - 19 19 
Transverse diameter of transverse processes... « 50 72 
Length of transverse processes from base (posterior) to tip end... syle 24 
ole) ? 
Height of neural spine.. 
Siath Lumbar Vertebra.—The sixth lumbar ver- 
tebra is characterized by the absence or very rudi- 
mentary development of anapophyses, and also by a 
considerable transverse broadening of the centrum 
posteriorly. There is otherwise very little difference 
between this vertebra and the one preceding it. 
Fie. 21. Sixth Lumbar Vertebra of 
D. superbus. 4% nat. size. 
MEASUREMENTS OF SIXTH LUMBAR VERTEBRA. 
Mm, 
Antero- posterior diameter of centrum. 
Transverse diameter of centrum 
Vertionl diatnctor Of COUbraiilsrscs tek, sat! scnsccee<tedecwe«seeess ccheredenccscrseestoteciess 4ihostetl voc sohtacnapeds tae 
Transverse diameter at transverse processes, approximately. 
Height of neural spine, approximately... 
Seventh Lumbar Vertebra—The centrum of the seventh lumbar vertebra is as 
usual quite depressed. The transverse diameter of the posterior face is nearly equal 
to its antero-posterior diameter and the ventral keel and lateral ridges are promi- 
nent, especially on the anterior half of the centrum. The transverse process is 
‘“‘The Genus Temnocyon and a New Genus thereof, etc.’”? Amer. Geol., Vol. XVII, pp. 273- 
14 Ryerman, J. 
274, 1896. 
